The profile of Professor Jan Siuta, the founder and long-time Editor-in-Chief of the “Inżynieria Ekologiczna” journal, was presented. His biography and legacy are outlined, but the main focus is on his passion for promoting ecological engineering as a field of knowledge. Against the background of his numerous activities and achievements, efforts were made to show what human he was and how much influence he had on many of his students and colleagues. He was the inspirer of many ideas, a disinterested opinion-maker, at the same time critical and favorably, fully committed, and extremely diligent in achieving the set goals. He left many followers of his life achievements; proud that they had the honor of being his friends.